Edge-trimming machine for stone blocks



March 12, 1929. E 'A HASE 1,704,855

EDGE TRIMMING MACHINE FOR STONE BLOCKS Filed May 27; 1927 E "44 J Z0 Patented Mar. 1929.-

A. CHASE, OI NQRTHFIELD,'VERHONT.

PATENT OFFICE.

EDGE-EWING MAGHINE FOB STONE BLOCKS.

Application 1mm my 27, 1921. Serial no. 194,709;

- This invention relates to a machine for. trimming the edges of blocks of stone and particularly for trimming the edges of granite blocks a's-used for :ornamental or -memorial purposes.

It is the general object of my mvent on toimprove the construction of such trimmingmachines as heretofore used, one such rior machine being disclosed'mmy pr1or atent No. 1,509,585.

- Further objects of myinvention are to provide a machine which will be more general in its utility than the prior machines, more convenient'in operation, more compact 16 in construction, and more readily adapted to a wider range of designs.

With these general ob ects in view, myinvention relates to arrangements and combinations of arts which will be hereinafter described an more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in'which Fig. 1 is an end elevation of my improved machine;

Fi 2 'is a plan view thereof, with the ing wheel omitted for the sake of clearness' Q Q Fig. 3 is a side elevation of certain'ectuating mechanism;. v

Figs. 4 and .5 are detall views, lllustratingthe use of dilferent shapesof wheels to promachine; and" T Fig. 6 is'a ewof a stone block having its es by the use of In inventio v 11.; Re erring to th drawings, my improved edgeitrimming comprises a grindab e abrasive, mounted. on La. wheel shaft. 10

rotatable axialv -movement therein "a collar 12..- Ihe wheel w' maygbeirotatedfl y they :13 and belt ingany other can enientfmanner.

' ,11 are" on-.a bracketg idiiblyymounted 'f a post or. ffverticallyadmstableby a an screw. 18 ori'n anytoother. eon'ven1ent manner. l' lhe stone .8 is 7 mountedoitaiyiloating sup ort olfiplatform The-beam:

. riage '21 m itbleiilongitua nsu ast the ,wharwgm mi; 22. The support -20"-is' mounted 'fdri-fi lf ndconvenient moveme'nt relativeto the =caror other sultf riage 21 angularly ineve direction preferably provided with a smooth steel plate 23 forming thebottom of the support 20, the carriage 21 being provided with {a similar steel plate 24. Large steel balls andisv 25 are interposed between the steel. plates 23 and 24, thus permitting universal move-- ment of the support 20 on the carriage 21. A pattern bar or guide 30 is secured to the edge of the support 20 by bolts 31 or other securing devices, and enga es a pair .of guide-rolls 32 mounted; on a bracket .33 secured to the post or column 16. A third guide-roll 34 is mounted 'on the slide 35 su ported 1n transverse guide-ways in. t e

racket 33. A lever 36 is. pivoted at 37 on the bracket 33. and hasa pin and slot connection with the slide 35. A s ring 38 applies tension to the lever 36, tiius drawing the guide-roll 34"firmly against one side of the guide-bar 30-, while the rolls 32 engage the opposite side. The guide bar 30" Q is commonly. provided with a stiffening and nally bya pinion 41 rotated from any conrindingwheel W. One form venient source ofpower. A block 42 is'secured to the rack bar 40 and is. connected duce different edge fonn s'f by the of myby long connecting rods or links 43 and 44 to. the carriage 21 and to a stud 45 on the support 20. The stud45 is preferabl located at the middle of the length 0 the ort and toward the rinding wheel.

811 faving described the etails of construc- .tion of my improved machine, the operation thereof will bereadily'a parent. The pattern guide 30 maybe 0 port will Eerinding wheel, the stone and an moved about on the carria 'e y the cojoperation ofthe 'uide-rolls wit thepattern shape of the pattern." Wheels of different any desired shape and will correspond to'the outline to.

be (produced upon the stone; As the carria e: an support are moved slowly past e section maybe used to produce different desired edges, tw.o 'difi'erent forms 'being illustrated 1n Figs. 4 and 5. The

nding wheel :W may adjusted ing operation by the'hand wheel 17.

I vertically i -either before or durmg the. d-" ythe construction above described, a relatively simple and compact machine is adapted to trim the edges upon stone blocks of any size or length and to provide edges of any desired contour or section merely by changing the pattern bar and wheels.

lit will be noted that the operative portion of the pattern baris always substantially beneath and in the plane of the grinding wheel.

Having thus described my invention and the advantages thereof, 1 do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. An edge trimming machine comprising a grinding wheel rotatable in a vertical plane, means to adjust said wheel vertically, a carriage movable horizontally past said wheel, a stone. support thereon, means to move said support, a pattern bar mounted on said stone support, and guide rolls mounted on fixed pivots and engaging said pattern bar, said rolls and bar being effective to move said support bodily toward and away from said wheel as said support is .moved past said wheel, and also to change the angular relation of said stone and wheel.

2. An edge trimming machine comprising a wheel mounted to rotate in a single vertical plane, a carriage movable in a horizontal path parallel to the plane of said wheel, a

stone support mounted on said carriage and movable angularly and bodily relatively thereto, a pattern bar mounted on said stone support, and guiding devices mounted in, fixed positions and engagin said pattern bar to vary the position of saidsupport and stone relativeto said wheel in'a horizontal plane.

' 3. An edge trimming machine comprising a wheel mounted to rotate in a single-vertical plane, a carriage movable in a horizontal path. parallelto the plane of said wheel, a stone support mounted on said carriage and movable angularly, and bodily relatively thereto, a pattern bar mounted on said stone support, guide rolls mounted on fixed pivots and engaging said pattern bar to vary the position of said support and stone relative to said wheel in a horizontal plane, and means to hold said bar yieldingly in engagement with said ide rolls.

4. An edge trimming machine comprising a grinding wheel rotatable in a fixed vertica plane, a floating support for a block of stone, a carriage on 'w mounted for movement axially of said wheel,-means to move said carriage and supich said support is area-nee wheel as said support and carriage are moved longitudinally past said wheel and also angularly relativeto said carriage.

5. An edge trimming machine comprising a grinding wheel rotatable in a fixed axial position, a floating support movable in any direction in a single plane for a block of stone, a carriageon which said support is mounted for movement axially of said Wheel, means to move said carriage and support longitudinally past said wheel, a pattern bar fixed on said support, a pair ofspaced rolls rotatable on fixed axes and engagin one side of said pattern bar, and a third roll yieldingly mounted between said two --fixed rols and engaging said bar on the opposite s1 e.

6. An edge trimming machine comprising a grinding wheel rotatable in a fixed axial position but adjustable vertically, a floating support for a block of stone, a carriage on which said sup-port is mounted for movement axially of said wheel, means to move said carriage and support longitudinally past said Wheel, a pattern bar fixed on said support, and positioning devices mounted in fixed position and engaging said patte 11 bar to' move said support and stone bodily toward and away from the wheel as said support and carriage are moved longitudinally past said wheel, the operative portion of said pattern bar being always substantially beneath and in the plane of the grinding wheel. l 1

7. An edge trimming machine, comprising a grinding wheel, a carriage movable horizontally past said wheel, a stone support thereon, antifriction bearings between said support and said carriage, meansto retain movable in said location, means to move said.

support, a pattern bar mounted on said stone support, and guide rolls mounted on fixed pivots and engaging said pattern bar, said rolls and bars being efi'ective to move said support bodily toward and away from said wheel as said support is moved past said wheeland also to change the angular relation of said stone and wheel. I v

In testimony whereof I have hereunto ailixed my signature.

ELROY A. CHASE. 

